Thanks everyone for their help so far. A match set would be nice but I have 8" in the front.
Avon do a 225/60R15 but I am not sure if I will have clearance issues at the front? I was also trying to take George's advice on trying to get the same fill of the wheel arches front and back which a 225/50R15 would do better.
I don't mind a mixed set, and I am interested in others members experiences. So thanks for your sharing your experiences of the P7's and the R888R'r.
I will try Longstone for some advice when they open this week.